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a348111e97
* tests: update to PHPUnit 6.0 with rector * fix namespaces on tests * composer + tests: use standard test namespace naming * update travis * resolve conflict * phpstan lvl 2 * phpstan lvl 3 * phpstan lvl 4 * phpstan lvl 5 * phpstan lvl 6 * phpstan lvl 7 * level max * resolve conflict * [cs] clean empty docs * composer: bump to PHPUnit 6.4 * cleanup * composer + travis: add phpstan * phpstan lvl 1 * composer: update dev deps * phpstan fixes * update Contributing with new tools * docs: link fixes, PHP version update * composer: drop php-cs-fixer, cs already handled by ecs * ecs: add old set rules * [cs] apply rest of rules
61 lines
2.0 KiB
PHP
61 lines
2.0 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Phpml\Tests\CrossValidation;
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use Phpml\CrossValidation\StratifiedRandomSplit;
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use Phpml\Dataset\ArrayDataset;
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use PHPUnit\Framework\TestCase;
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class StratifiedRandomSplitTest extends TestCase
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{
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public function testDatasetStratifiedRandomSplitWithEvenDistribution(): void
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{
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$dataset = new ArrayDataset(
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$samples = [[1], [2], [3], [4], [5], [6], [7], [8]],
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$labels = ['a', 'a', 'a', 'a', 'b', 'b', 'b', 'b']
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);
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$split = new StratifiedRandomSplit($dataset, 0.5);
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$this->assertEquals(2, $this->countSamplesByTarget($split->getTestLabels(), 'a'));
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$this->assertEquals(2, $this->countSamplesByTarget($split->getTestLabels(), 'b'));
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$split = new StratifiedRandomSplit($dataset, 0.25);
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$this->assertEquals(1, $this->countSamplesByTarget($split->getTestLabels(), 'a'));
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$this->assertEquals(1, $this->countSamplesByTarget($split->getTestLabels(), 'b'));
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}
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public function testDatasetStratifiedRandomSplitWithEvenDistributionAndNumericTargets(): void
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{
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$dataset = new ArrayDataset(
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$samples = [[1], [2], [3], [4], [5], [6], [7], [8]],
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$labels = [1, 2, 1, 2, 1, 2, 1, 2]
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);
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$split = new StratifiedRandomSplit($dataset, 0.5);
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$this->assertEquals(2, $this->countSamplesByTarget($split->getTestLabels(), 1));
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$this->assertEquals(2, $this->countSamplesByTarget($split->getTestLabels(), 2));
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$split = new StratifiedRandomSplit($dataset, 0.25);
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$this->assertEquals(1, $this->countSamplesByTarget($split->getTestLabels(), 1));
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$this->assertEquals(1, $this->countSamplesByTarget($split->getTestLabels(), 2));
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}
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private function countSamplesByTarget($splitTargets, $countTarget): int
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{
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$count = 0;
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foreach ($splitTargets as $target) {
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if ($target === $countTarget) {
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++$count;
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}
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}
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return $count;
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}
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}
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